/**
 * Copyright 2000 self.com.au
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. (http://www.apache.org/licenses/LICENSE-2.0)
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed 
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for 
 * the specific language governing permissions and limitations under the License.
 *
 * <dhamma-message src="Atisha (11th century Tibetan Buddhist master)">
 * 	The greatest achievement is selflessness. The greatest worth is self-mastery.
 * 	The greatest quality is seeking to serve others. The greatest precept is continual awareness.
 * 	The greatest medicine is the emptiness of everything. The greatest action is not conforming with the worlds ways.
 * 	The greatest magic is transmuting the passions. The greatest generosity is non-attachment.
 * 	The greatest goodness is a peaceful mind. The greatest patience is humility.
 * 	The greatest effort is not concerned with results. The greatest meditation is a mind that lets go.
 * 	The greatest wisdom is seeing through appearances. 
 * </dhamma-message>
 *
 * @author Ashin Wimalajeewa
 */
package self.amigo.elem;

import java.io.*;
import java.awt.*;
import java.util.*;

import org.w3c.dom.*;

import self.lang.*;
import self.gee.*;
import self.xml.*;

public abstract class AGraphicElement implements IGraphicElement, Serializable {
  final static public String FRAMECOLOR_PROP = "framecolor";
  final static public BasicStroke DEFAULT_STROKE = new BasicStroke();
  final static public BasicStroke WIDER_STROKE = new BasicStroke(2.0f);
  final static public BasicStroke DASHED_STROKE = new BasicStroke(1.0f,
    BasicStroke.CAP_BUTT,
    BasicStroke.JOIN_MITER,
    10.0f, new float[] {10.0f}, 0.0f);


  private int refId;
  protected IDiagramLayer layer;
  protected Color         frameColor = Color.black;
  protected boolean       outlineOnly = false;

  public AGraphicElement() {
    refId = hashCode();
  }

  public int        getReferenceId() {
    return refId;
  }

  public void       setLayer( IDiagramLayer layerToDrawOn, boolean add ) {
    layer = layerToDrawOn;
    if ( add )
      layerToDrawOn.addElement( this );
  }

  public void       remove() {
    layer.removeElement( this );
  }

  public IDiagramLayer getLayer() {
    return layer;
  }

  public boolean    areDependentsListed( java.util.List toCheck ) {
    return true;
  }

  protected class ColorFeature implements IElementFeature, Serializable {
  	
	/**
	 * If the internal state of this class ever changes in such a way that it can't be defaulted,
	 * then the {@link #serialVersionUID} should be incremented to ensure serialized instances cleanly fail.  
	 */
	private static final long serialVersionUID = 1;
	
    private String propertyName;
    public  Color  color = Color.black;

    public ColorFeature( String propName ) {
      propertyName = propName;
    }

    public void       getProperties( Map store ) {
      store.put( propertyName, new Color(color.getRGB()) );
    }

    public void       setProperties( Map data ) {
      color = (Color) data.get( propertyName );
    }

    // IPersistentElement support
    public void readFrom( Node self, HashMap idObjLookUp ) throws DOMException {
      String colorAsString = null;
      try {
        colorAsString = DomUtils.getElementAttribute( self, propertyName );
        if ( colorAsString.equals("NOFILL") )
          color = null;
        else
          color = new Color( Integer.parseInt(colorAsString) );
      } catch ( Exception err ) {
    	// nothing to do.
      }
    }

    public void writeTo( Document doc, Element self, HashMap objIdLookup ) throws DOMException {
      if ( color != Color.black ) {
        String colorAsString = null;
        if ( color == null )
          colorAsString = "NOFILL";
        else
          colorAsString = String.valueOf( color.getRGB() );
        DomUtils.setElementAttribute( self, propertyName, StringUtils.toEmptyIfNull(colorAsString) );
      }
    }
  }

  static protected class GraphicAttrs {
    private Color color;
    private Font  font;

    public GraphicAttrs( Graphics g ) {
      color = g.getColor();
      font  = g.getFont();
    }

    public void reset( Graphics g ) {
      g.setColor( color );
      g.setFont( font );
    }
  }
}
